Sears offers the Craftsman 12-Wrench Organizer, model no. 65272, for $4.99. Opt for in-store pickup to avoid the $5.99 shipping fee. That's at least $4 less than you'd spend at another local retail store It can be mounted to the wall,\ and it also fits in drawers with at least 3" of vertical clearance.
Of note, Shop Your Way Rewards members will earn a Sears credit with this purchase and may be eligible for additional credits and discounts.